.FRM FILE WHEN DEFAULT USED

Analysis
========
SHOW CREATE TABLE for tables with implicitly or explicitly
specified DEFAULT row format does not show the actual row
format used by the table.

The output of SHOW CREATE TABLE shows the actual row format used
only when the actual format is explicitly specified in the
CREATE TABLE statement. SHOW CREATE TABLE code suppresses displaying
the actual row format if the row format is not specified at all, or
if ROW_FORMAT = DEFAULT is explicitly specified. This may cause
TTS table import to break if the destination server is using a
different default row format than the server from which it is
exported.

Fix
===
A new per-session dynamic system variable called 'show_create_table_verbosity'
and a corresponding start-up option is introduced. The decision to add a new
variable was in order to preserve the current behavior of SHOW CREATE TABLE.

Variable name: 'show_create_table_verbosity'
Values accepted: Boolean values.
Default value: 0 or FALSE.

When this variable set to 1/ON for the session, SHOW CREATE
TABLE behavior for that session is changed to display the actual
row format used by the table even if ROW_FORMAT = DEFAULT was
specified in the CREATE TABLE statement. By default(0 or FALSE)
causes the server to retain the old behavior i.e tables with
implicitly or explicitly specified DEFAULT row format during CREATE
TABLE does not show the actual row format used by the table in the
SHOW CREATE TABLE output.